It's no bother at all :3 I'm glad that one issue is solved, but it sucks that something else is still preventing you from playing >.<
That's definitely not supposed to happen. When you run the .exe, it should just load up the game (which can take a while depending on system specs.) I'm by no means a tech expert, but if it's opening in notepad or something instead, something must have gone wrong somewhere >.< I would imagine something in your system settings, but I wouldn't really know what to change to stop it from doing that :( As far as I can remember, when you export a game made in Tyrano for Windows, it should just work with most versions of Windows.
I did some Googling, and I can find fixes for systems where all .exe files are opening in notepad, but nothing specific for just one, or it being blank >.< All those fixes seem to mention fixing stuff in the registry, but I wouldn't wanna tell you to go messing with stuff when I don't even know for sure if that would fix it, and I certainly wouldn't want you to accidentally screw up your computer somehow :(
I did download the small version for Windows from here after reading your first comment, just to check the download wasn't randomly broken or something, but it still starts up fine for me.
I'm sorry I can't be of more help >.< Like I said, I'm not the most techy person when it comes to computer problems, so I'm not sure what the solution could be :(